英文關鍵字
alkalinity
aqua
blue
bromide
calcium
chemical
clean
cleaner
clear
cold
construction
cool
deck
dirty
equipment
green
ground
house
janitor
job
liquid
maintenance
man
manual
microorganisms
nature
pipe
pool
pressure
property
pump
residence
rich
service
side
stick
summer
surface
swim
swimming
tile
tools
tube
vacation
villa
water
wealthy
wet
work
worker